Final Answer:
The expected values for near vertical von Graefe are typically around 2 to 3 prism diopters.
Step-by-step explanation:
Von Graefe is a test used in ophthalmology to assess ocular misalignment, specifically vertical deviations. Near vertical von Graefe is conducted at a close distance (usually around 33 cm) and involves the patient fixating on a target. The test measures the amount of prism diopters required to align the eyes properly.
In near vertical von Graefe, the expected values commonly fall in the range of 2 to 3 prism diopters. This indicates the amount of prism needed to correct any vertical deviation in the patient's eyes when focusing on a near target. These values serve as a baseline for evaluating the degree of ocular misalignment.
Ophthalmologists interpret the results by comparing the observed prism diopter value to the expected range. If the measured value deviates significantly from this range, it may indicate a vertical strabismus or other ocular alignment issues. The goal of the test is to provide valuable information for diagnosis and treatment planning, ensuring optimal vision and ocular health for the patient.